This news is over a week old, but I didn't see it mentioned here. From TVShowsOnDVD.com (tvshowsondvd.com):

"In the not-too-distant future, Warner Home Video will announce a release date in late October or early November, for another 4-DVD box set. This time around it will contain 60 cartoon shorts ranging from 1936 to 1958. Included is another disc of just Bugs Bunny 'toons, plus a LOT of favorites from The Road Runner/Wile E. Coyote, AND a large group just from Sylvester & Tweety! It sounds like Warner listened to the fans who missed seeing more of those particular match-ups on the first release. Also on-board are the first ("Tortoise Beats Hare") and last ("Rabbit Transit") stories in the Bugs Bunny/Cecil Turtle (a.k.a. Cecil Tortoise) trilogy, the middle one of which ("Tortoise Wins By a Hare") was on the first DVD set.

The bad news? No Tasmanian Devil. No Pepe Le Pew. No Marvin the Martian. No Foghorn Leghorn. No Speedy Gonzales. It looks like we'll have to wait until Volume 3 to see more of these great characters. But let's face it: the Looney Tunes vaults are very deep, and mining all these gems is going to take quite some time. Be patient! Your favorites will arrive sooner or later, have no fear! For now, we are getting some terrific entertainment to enjoy while we wait for the next box set, including some highly-desirable classics!

Among the great shorts included on this compilation are "Porky in Wackyland," "Old Glory," "The Dover Boys," Little Red Riding Rabbit," "The Great Piggy Bank Robbery," the Oscar-winning first appearance of Tweety & Sylvester in "Tweety-Pie," "French Rarebit," "Hyde and Hare," "One Froggy Evening," and the long-awaited "What's Opera Doc?"

Here is the complete list of all sixty shorts that are expected to appear in this set:

One item that was rumored to be included in this set, the Dr. Seuss classic "Horton Hatches the Egg", wasn't included on the list we received. Perhaps it's being included as a bonus item, separate from the main list of shorts? We don't know. Lots of extras WILL be present, we're told, but no breakdown of them has been given to us just yet. We're hoping for a Jerry Beck featurette exploring the making of "What's Opera, Doc?", similar to the chapter in his wonderful book, Looney Tunes: The Ultimate Visual Guide. Stay tuned, and we'll have more information for you about The Looney Toons - Golden Collection Volume 2, just as soon as we can. But for the moment, that's all, folks!"